Pressure means for fiber preparation machinery



L. M BEE May 22, 1934.

PRESSURE MEANS FOR FIBER PREPARATION MACHINERY Filed Jan. 30, 1935 LUTHER M- BEE grwcm bo'v Tli Patented May 22, 1934 UNITED STATES PRESSURE MEANS FOR. FIBER PREPARATION MACHINERY Luther McBee, Greenville, S. 0.

Application January 30, 1933, Serial No. 654,152

4. Claims. (01. 19-136) This invention relates to a lever and a hook and bearing member adapted to be used for applying pressure to the top rolls of fiber preparation machinery such as spinning frames, drawing frames, roving frames and the like.

In levers heretofore used great difficulty has been experienced in keeping the lever in an upright position. Since the stirrup member very often consists of a wire with a loop in its lower end thru which the lever is placed and the fixed end of said lever is loosely connected to the spinning frame the lever after a very short period of use will assume a sidewise position, thus varying the distance from the fulcrum point to the fixed end of the lever and causing a variable pressure on the top rolls.

In cases where a bar instead of a wire is used for a stirrup the slot thru which the lever is passed becomes worn and after very slight wear the lever turns sidewise and has to be adjusted to a new position in order to keep the proper tension in the stirrup member.

It is a well known fact that a constant pressure must be maintained between the rolls in order to produce a yarn of uniform weight. It is, therefore, an object of this invention to provide a lever and hook and bearing member adapted to engage the fixed end of the lever and hold it in an upright portion. By using a hook and hearing member that has an increased bearing or contact surface with the horizontal as well as the vertical surfaces the lever is held in an upright position at all times regardless of the type of stirrup used. Consequently, a uniform pressure is maintained on the top rolls and yarn of uniform weight is produced without the necessity of constant adjustment of the lever.

Some of the objects of the invention having been stated, other objects will appear as the description proceeds when taken in connection with the accompanying drawing, in which Figure 1 is a cross-sectional view taken thru one side of a spinning frame and showing my invention attached thereto;

Figure 2 is an isometric view of an assembly of the lever and hook and bearing member;

Figure 3 is an isometric View of the left-hand end of the lever shown in Figure 2;

Figure 4 is an isometric view of the hook and bearing member;

Figure 5 is an elevation of the hook and bearing member showing it attached to a conventional screw.

Referring more particularly to the drawing, the numeral 10 denotes part of a spinning frame,

drawing frame, roving frame and the like which has attached to one side thereof a weight board 11. Mounted on top of member 10 is a roll stand 12 which projects upwardly and has a bearing member 13 on its upper end in which are mounted to lower rolls 14, 15 and 16. Another bearing member 18 is provided as at 19 in bearing member 13, and said bearing member 18 has mounted therein top rolls 20, 21 and 22. The yarn 23 is adapted to pass between upper rollers 20, 21 and a5 22 and lower rolls 14, 15 and 16. It can be seen that a constant pressure must be maintained between the top and bottom rolls in order to produce. a thread, of uniform weight. l

In member 10 a conventional hollow screw 26 {0 or similar fastening device is secured and mounted in this screw is a hook and bearing member 27 which is confined in said screw by any suitable means such as lock ring 28 mounted in groove 29 in the lower end of member 27. 75

The upper end of member 27 has an inverted T-shaped slot which has surfaces 30 which are adapted to contact the vertical surfaces of web 32.

The lever 34 has horizontally disposed webs 34a and 34b which fit loosely in transverse grooves 31 (13 and 31a. The webs 34a and 34b have transverse grooves 33 in the upper surface thereof adapted to fit against the upper side of slots 31 and 31a. Lever 34 penetrates oblong slot 35 in the lower end of stirrup 36 and the lower portion of slot 35 is the fulcrum point of the lever. The right hand end of lever 34 has suitable pressure applying means such as a weight hook rod 37 attached thereto with a weight 38 on the lower end of the IOd.

Stirrup 36 extends upwardly and is secured at its upper end to the front top saddle 40 which transmits a portion of the stress to the front rolls 20 and the other portion of the stress to the two rear rolls 21 and 22 thru member 41.

It can readily be seen in Figure 1 that the weight 38 attached to the free end of lever 34 produces a downward pull on stirrup 36 since the left hand end of lever 34 is pivotally secured to member 10 by means of hook and bearing member 27 and screw 26. This pull is transmitted to the top rolls thru members 40 and 11 just described and the necessary pressure between the top and bottom rolls is obtained. It is thus seen that I have provided pivoted connection between the lever and the hook and bearing member that will hold the lever in an upright position at all times regardless of the type of stirrup used and thereby provide a means for obtaining constant pressure on the top rolls at all times without the necessity of making frequent adjustments.

In the drawing and specification, there has been set forth a preferred embodiment of the invention, and although specific terms are employed, they are used in a generic and descriptive sense only and not for purposes of limitation, the scope of the invention being set forth in the appended claims:

I claim:

1. Pressure applying means for the top rolls of a drawing frame comprising a lever having pressure producing means attached to one end thereof, means for pivotally mounting the other end of the lever comprising a member secured to the frame and having an inverted T-shaped slot therethrough, said lever having a vertically disposed portion and two laterally extending portions adapted to loosely penetrate said slot and a stirrup pivotally engaging an intermediate portion of the lever.

2. Pressure applying means for the top rolls of drawing frames and the like comprising a lever, means secured to the frame and pivotally engaging one end of the lever and having a transversely disposed slot therein and also having a vertically disposed slot therein communicating with the transversely disposed slot, one end of said lever having projections thereon adapted to loosely penetrate said slots, means associated with the other end of the lever for applying pressure to the lever, and a stirrup having its lower ends engaged by the lever and having its upper end associated with means for applying pressure to the top rolls.

3. Pressure applying means for the top rolls of a drawing frame and the like, comprising a lever having pressure producing means attached to the free end thereof, means for pivotally attaching one end of the lever to the frame, the pivoted end of said lever comprising a horizontal web portion and an intermediate vertically disposed web portion, the means for attaching the pivoted end of said lever to said frame comprising a member having its lower end turnably secured to the frame and its upper end having a hooked shaped bifurcated head portion, said portion being adapted to engage the upper surface of said horizontal web portion and to contact the vertical surfaces of said vertical web portion to prevent lateral movement of said lever.

4. Pressure applying means for the top rolls of a drawing frame comprising a stirrup member, a lever comprising a vertically disposed plate member and being supported at a point intermediate its ends by the lower end of said stirrup, pressure producing means on the free end of said lever,

laterally projecting flanges on opposed sides of said vertically disposed plate member located on the other end of said lever, a member for connecting said other end to the frame and having a pair of hooks on its upper end, each of said hooks having a bearing surface and contact surface adapted to engage the laterally projecting flanges and the vertically disposed plate member respectively.

LUTHER MCBEE.

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